Self-dumping truck



I 1,633 515 June 1927' P. A. BRICK SELF DUMPING TRUCK Filed March 4. 1926 2 Sheets-Sheet l June 21, 1927. 1,633,515

P. A. BRICK SELF DUMPING TRUCK Filed March 4. 1926 2 Sheets-Sheet 2 1 ur I: 5; 2s ulnHlIIlHl-HII Patented June a 21, 1927.

UNITED; STATES;

PATENT OFFICE.

PERRY AJBRIGK, OF GALIONyOHIOQASSIGNOR TO THE nA'rioNAI. GRAVE VAULT 00.,

E GALIQN, 01-110; A CQRPORATION E'QHIO.

SELF-DUMPING' TRUCK;

Application'filed Mmh 4,- 1926. serin no. 92 869;

This invention relates todm'npingtrucks of that character Where the body is mounted for rocking, movement upon the fra'meor tion to discharge its load and aftertheload is dischargedthe body will return to itshorizontal position by, its own. weight;=

The invention particularly relates toimprovements in 'th-e construction disclosedin the pending application of Ernest Eisenhut, tiled February- 3., 1925, Serial No. 6,608.

In this pending application there-is disclosed :a body tilta'bly' mounted upon the truck frame or chassis above stat-edQand a prop formed in two sections pivoted to each other and to the body and chassis re-; spectively and so constructed that when :a certain locking :device is released and the body tilts to discharge the load the two sections oi? the prop will bebrought into alignment and. locked and when, thislock is re leased and an initial impulse given to the body, the two sections ofthe prop will break and the prop will told and permit the-downward movement of the body. 7

One of the objects of therpresent invention is to provide in .a construction of-this character means for retaining the body' in its horizontal or lowered position against any tendency to tilt, which means-has "1a camming action against a part of the 'boclyand which means is so 'formed that as the truck body is tilted due to the truck move ing overt-he road, the retaining means or latch will move farther and farther into operative engagement with the; body. and

hold it tighter and tighter :to the .truck of the body so that when theloa-d has been discharged the body will tend to return to.

frame or chassis.

Still another object is-to improve upon the details of construction of the propvan'd its latching meansxas illustrated in the afore said application of Eisenhutrsuch improvements rendering'the operation of the-prop more certain and positive and tendingto simplify the construction. 1 7

Other objects will appear in thecourse of the liollowingdescription.

. frame.

My invention is illustrated in the accompanying drawings; wherein Figure 1 is a" fragmentary side elevation of a dumping truck constructedin accordance with myinvention Y Fig -;re 2 1s a llke view to Figure 1 but showing the body tilted;

Figure 3 is a top plan viewof a' portion of the upper section of the prop and spring;

Figure 4 is a fragmentary vertical section from front'to rear showing in elevation the actuating and-locking mechanism;

Figure 5 is a section on the line 5'5 of Figure 4;

Figure 6 is a like view to Figure but showing'the position of the parts when the body is in dumping position.

- Referrin to these drawings it will be seen that f-have illustrated a portion of a dumping truck in which-the frame or chassis of thetruck includes longitudinal beams 10, whichmay constitute the top of the chassis Mounted upon the beams at their rear ends is an approximately U-shaped angle iron 11 and atthe rear ends of the arms of this angle iron there are disposed parallel short irons 12 and a plurality of transverse pins 13. The dumping'body 14 isprovided with a pair of sector shaped members 15 having teeth which mesh in the space between the pins-13 and the sector.

shaped members 15 and the pins 13'constitute a. fulcrum upon which vthe dumping bodv tilts this'iulcrum being shittable so that when the body 14 is in a horizontal position and loaded the fulcrum will be forward of the middleot the body and hence the weight of the load will tend to tilt the body to a dumping position and when the body has been tilted to a dumping position the fulcrum will be rearward of the middle body .andconnectedby a plate 1.9- but I do.

not wish to :be limited to this specific manner manner is a shaft of constructing the counterweight, however. This counterweight carries upon it the vertical angle irons 20, which support the latch pin 21. Mounted. upon a transverse angle iron 22 are the vertical angle irons 23 and mounted upon a transverse pin 24 and carried by these angle irons 23 is the latch 25, this latch having an arcuate underface 26 which is eccentric to the pivotal axis of the latch in that the radius of the rear end of this latch is longer than the radius of the front end of the latch. The face 26 of this latch is adapted to engage over the latch pin 21 previously described, when the body in a horizontal position.

Mounted in cars projecting upward'fron'i the angle iron 22 or in any other suitable 27 which carries upon it the upwardly projecting trigger 28 which at its upper end has an upwardly projecting ear pivotally connected to the latch by a link 29. This trigger 28 carries the transversely extending head 30 and below the shaft 27 is provided with the downwardly extending lug 31. This shaft 27 carries upon it the arm 32 which is connected by a rod or link 33 to a lever 34 mounted in any suitable manner upon the. frame of the truck so that when this lever is pulled in one direction it will pull on the arm 32 and thus retract the latch 25 from its engagementwith the latch pin. Aspring 35 coiled around the shaft 27 acts to' urge the shaft in a counter clockwise direction to thereby urge the latch into engagement with the latch pin and cause the turning of the arm Also mounted upon the shaft 27 is one section 36 of the prop, this section being formed of two parallel bars 37, as shown in Figure 5, disposed, one on each side of the hub of the trigger. This section 36 is pivoted at its outer end as at 38, to a-prop section 39, having at its extremity a head 40, notched or grooved at its opposite ends to receive the U-shaped yoke 41. A compression spring 42 is disposed between the bight of the yoke and the head 40 and thus urges the yoke downward on the section 39. This yoke is pivoted upon a transversely extending pivot pin 43 in turn carried by depending ears 44, attached to the dumping body 14 in any suitable manner. Preferably these ears are provided with two apertures 45 for the passage of the pin 43 so that this pin may be adjusted in either of these passages.

The section 39 adjacent the pivot 38 is formed with a rounded corner46 and with a recess 47 just above this rounded corner. Pivotally mounted between the two members 37 of the section 36, is the prop latch 48 which is somewhat hook-shaped to pro vide a bill 49 engageable in the locking recess 47. This latch is urged in one direction by a spring 50 mounted upon a transversely sist of a rod 53 which has sliding engagement through an eye 55 formed in the arln 31. While this is the preferable construction I do'not WlSll to be limited to it.

VVit-h the parts in the position shown in V Figure 1, and the body of the truck locked, if it be desired to dump the load then a pull on the hand lever 34 produces a partial clock-' wise rotation of'shaft 27 and trigger 28 which will pull the latch 25 rearward and out of engagement with the latch pin 21, the weight of the load will tilt the box lifting the front end thereof and causing the prop or stiff arm to straighten out until the points 27, 38 and 43 are approximately in line. The tilting motion is then stopped, the prop having reached its greatest possible extension and at this moment thespring 42. absorbs the shock. WVhen the prop has reached the position where both sections are in alignment with each other the notch 47 will have air rived opposite the extremity 49 ofthe latch 48 which will be forced into the notch by our the spring, thus holding the prop rigid and preventing its folding up. As soon as the front end of the box has started to rise after the initial actuation of the hand lever 34, the spring 35 will produce a counter clockwise rotation of the shaft 27 which will push the latch 25 forward and elevate the arm 31 to a point approximately level with the shaft 27. \Vhen the prop straightens out and the. latch 48 engages in the notch 47 the connection 53, if this connection is merely a flexible chain or wire, should be loose enough not to hinder this movement. This is accomplished in the construction illustrated in Figure 4 by causing a sliding engagement between the rod 53 and the eye 55.

To bring the box'back into its horizontal position a pull is exerted upon the hand lever 34 precisely like the pull exerted for the purpose of causing the box to tilt, this pull producing a clockwise rotation of the shaft 27 and trigger 28 and exerting a pull upon the connection 53, pulling latch 48 out of engagement with thenotch 47. The connection 53 should be of such length that as soon as the latch 48 is out of engagement with the notch 47 the crosshead 30 on the trigger, will come into engagement against the upper or front side of the two bars 37 which constitute the lower section 36 of the prop. A small movement of the hand lever 34 issufiieient to produce this result and a further lull 'duces a counter clockwise rotation of the.

- pulsefor fol-ding up the prop and bringing thefrontend of the box downward. As soon, as t'his. initial impulse has been given thecounterweightlfi acts to bring the box back to'a horizontal position; Immediately after the initial impulse is given the hand lever 34 is released. The spring 85, of course, proshaft 27-,causing the latch 25 to move for-v ward. As the forward end of the body with the counterweight moves downward thelatch pin {21 will strike the in'clined'front edge of the latch 25' forcing the latch back until the latch pin 21 is below the front lower corner of the latch 25 whereupon the spring 35 will again force 'theflatch 25 forward over the latch pin. The eccentric surface26 of the latch causes a wedging action which continues until the counterweight 16 is down firmly on its seat and the latch25. crowding inabove the latch pin 21 so that,

there'isno possibility of movement up or down of the front end of the box. It will be seen that resistance to upward movement of the latch pin 21 is not dependent upon the strength of spring 35 but that the relative position of the ,pin 21 and the'pivot pin 5 cause the crowding downward of the counterweight, an equivalent action can take place. The spring 35-must, of course, have sufficient strength to start the latch in over the pin 21 and preferably it will have sufficient strength to keep on shifting this latch forward so long as there is no resistance. As

the truck starts to move and I, as it moves there will naturally be a tendency of the box to rock or jog upon its bearings and the upward thrust thus developed by the front end of; the box will be checked by the latch 25 and any downward movement of the front end of the box or of the counterweight will permit the latch 25 to move forward and take up the lost motion or, in other words,- any downward movement of the forward end of the box will permit the latch to crowd inward and exert a camming action Thus, I have provided a upon the pin 21. completely automatic device for latching the front end of the box and keeping it always free from any vertical play.

lVhile I have illustratedthe spring 35 "for the purpose of oscillating the shaft 27 in one-direction-a weight-might be used upon the rear fafce/of the-latch, which weight would be. sufficient to cause the' latch to be urgedfo'rWard-towards a positionwhere its upper-:face' would be approxnnately horn zontal;

It will be seen-thatthis mechanism-pro vides means for positively latching thetruck body inits horizontal position and lowering the bod y from its p tilted position, both of:

said means being released. byv a relatively:- slight movement-of the hand lever but rendering it unnecessary for theoperator to as- .e

sist=gravity in-any wayfin tilting the body or returning the body to its horizontal position." Thisoperation ofthe lever to permit a dumping movementof the body orthe re-- turn of the body is secured'without moving thechassis .and without requiring the driver to dismount even from a closed cab, .open any doors-o-r-windows of the cab, or even turn around The gravity. Operated body canbe held at a dumping angle just as long asrequired. The latch for holding the body in its horizontalposition is so constructed as to, take up any oscillation of the body and hold the body firmly down uponthe'chassis. After the initial impulse: has been given either to dump the body or toreturn the body. to its horizontalposition the remainder of the operation is entirely automatic. By the provision ofja plurality of bearing openings in the ears 1 1 I'provide means whereby the extreme angle to which the body tilts may be adjusted- It will" be seen that I provide-automatic means for latching the front end of the body and keeping it always tight down against the chassis and free from vertical play, and that thisautomaticcrowding in of the latchcan be secured either by a spring engaging thepivot upon which the latch is mounted, or otherwise engaging the latch, or by a i this crowding, action is secured'by the eccentric curvature given to the under face. of the latch whichcauses it to wedge-into engagement with the pin or keeper 21.

1. In a truck, a chassis, a tilta'ble body thereon having a keeper, a latch pivotally' mounted .upon the chassis for swinging movementover and into engagement with the keeper,.and having a rounded eccentric lower face engageable with the keeper, a shaft upon which the latch is mounted, having ahandle whereby thelatch may be withdrawn from its engagement with the keeper, and a spring surrounding the shaft and acting thereon to urge the shaft in a direction to carry the latch into wedging engagement with the keeper.

2. In a vehicle, achassis, a tiltable body mounted thereonand having a keeper, a latch pivotally n'lounted at its upper end upon the chassis above the keeperfor swing lit) ing movement over and into engagement with the keeper, said latch having a lower face adapted to have wedging engagement with the keeper, and manually operable means for withdrawing the latch from its engagement with the keeper.

3. In a vehicle, a chassis, a tiltable body mounted thereon and having a keeper, a latch pivotally mounted upon the chassis for swinging movement over and into engagement with the keeper, the latch having an eccentric lower face adapted to have wedging engagement with the keeper when the body is lowered, means acting to an-' tomatically lock the body in a tilted position and against reverse movement, and a single operable means for releasing the latch to permit the movement of the body to a tilted position andthen movable to release t-helocking means to permit the body to return to its horizontal position. I

. 4. In a vehicle, a chassis, a tiltable body mounted thereon for movement from a horizontal to a tilted position, said body having a keeper at its forward end, a prop formedin two sections, pivoted to each other and respectively pivoted to the chassis and to the body, a pivotally mounted latch carried by the chassis and adapted to engage said keeper as the body reaches a horizontal position, said latch having wedging engagement therewith, and manually actuatable means operatively connected to said latch to shift the latch from its engaging position and permit the tilting of the body, a lock carried by one of said sections of the prop and adapted to engage the other section of the prop when the sections are in aligned position to thereby hold the body in a tilted position, said latch actuating means shiftable to withdraw the prop lock and when the prop sections are in aligned position acting to operatively engage one section of the prop and cause the sections to move from the aligned position to thereby permit thebody to move downward, and a spring urging the latch to a latching position.

5. In a truck, a chassis, a tiltable body having a keeper at its forward end, and means for holding the body lowered upon the chassis including a segmental member pivotally mounted upon the chassis for swinging movement in a vertical plane, the rear edge face of the segmental member be ing downwardly and forwardly inclined when the member is in its normal position, and the lower edge face of said member being eccentric to its pivotal center and adapted to have wedging engagement with the keeper when the body is lowered, a spring urging said latch toward the front of the body, and manually operable means for withdrawing the latch.

6. In a truck, a chassis, a body tiltably mounted thereon for movement from a horizontal to a tilted position and vice versa, said body having a keeper at its forward end, a prop formed in two sections pivoted to each other and respectively pivoted to the chassis and to the body, one of said sec tions having a notch adjacentits pivotal connection with the other section, and the other section having a latch pivoted thereon and adapted to engage in said notch when the sections are in aligned position, a latch v pivotally mounted upon the chassis andv adapted to swing over and into engagement with the keeper, when th'echassis is lowered, amanually operable, shaft mounted upon the chassis and having an upwardly extend ing projection operatively connected to said second named latch, and a downwardly extending projection operatively connected to the first named latch whereby to simultaneously cause the retraction of both of said latches bysaid manually actuatable member. 7. In a vehicle, a chassis, a tiltable body thereon, means for holding the body tilted including a prop formed in two sections pivoted to each other, the sections being respectively pivoted to the body and to the chassis, a latch pivoted to the lowermost section and adapted to engage the uppermost section when the sections are in approximate alignment and the body is tilted to thereby hold the prop from breaking, a latch pivotally mounted upon the chassis for swinging movement in a vertical plane, said latch having a downwardly and forwardly inclined forward edge faceeccentric to the pivotal center of the latch, a keeper mounted upon the body at its forward end and adapted to engage the forward edge of the latch to swing it rearward as the body descends and to be engaged by the eccentric lowerwfa'ce of the latch when the keeper has passed the latch, a manually actuatable shaft mount- 'ed upon the chassis andoperatively engaging both of said latches, and a spring urging the shaft in a direction to shift the second named latch into the path of movement of the keeper.

8. In a truck, a chassis, a tiltable body thereon. and means for holding the body lowered upon the chassis including a keeper on the body and amember pivoted at its upper end on the chassis above the keeper and swinging toward and over the keeper when the body is lowered and having wedging engagement with thekeeper, and means urging the pivoted member into said wedging engagement.

9. In a truck, a chassis, a tiltable body thereon and having a keeper, and means for holding the body lowered upon the chassis including a latch pivoted at its upper end upon the chassis and above the keeper for swinging movement toward and over the keeper and having an eccentric lower face engageable with and over the keeper, and means urging said latch toward the keeper. 10. In a truck, a chassis, a tiltable body thereon the body having a transversely ex- 5 tending keeper, and means for holding the body lowered upon the chassis including a latch pivotally mounted upon the chassis and adapted to swing over the keeper, the latch having an eccentric lower face engaging engagement therewith.

In testimony whereof I afiix my signature.

' PERRY A. BRICK. 

